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BioMed Research International
Volume 2013 (2013), Article ID 267968, 7 pages
http://dx.doi.org/10.1155/2013/267968
Research Article

Environmental Kuznets Curve Analysis of the Economic Development and Nonpoint Source Pollution in the Ningxia Yellow River Irrigation Districts in China

1College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
2The Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling, Shaanxi 712100, China
3College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
4College of Resources and Environment, Henan Agricultural University, Zhengzhou, Henan 450002, China

Received 22 May 2013; Revised 26 July 2013; Accepted 19 August 2013

Academic Editor: Eldon R. Rene

Copyright © 2013 Chunlan Mao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study applies the environmental Kuznets curve to test the relationship between the regional economic growth and the different types of agricultural nonpoint source pollution loads in the Ningxia Yellow River irrigation area by using the Johnes export coefficient method. Results show that the pollution load generated by crop cultivation and livestock-breeding industries in the Ningxia Yellow River irrigation area shows an inverted U-shaped feature; however, this feature is absent in living-sewage pollution load. Crop pollution has shown a decreasing trend since 1997 because of the increased per capita income of farmers. Livestock-breeding pollution load reached its turning point when the per capita income of farmers reached 8386.74 RMB. Therefore, an increase in the per capita income of farmers corresponds to an increase in the livestock-breeding pollution load in the Ningxia Yellow River irrigation area.